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As Andrea Ercolani reports from Stromboli, the "normal" strombolian activity seems to be returning to the summit craters since early July. ...more

After the effusive eruption which ended on 4th of April this year and a powerful vent-clearing explosion on 15 March, there have been deep-seated explosions ejecting black ash clouds since May. In July, these have beomce more regular and it seems that the magma level inside the vents has been rising and there could soon be visible lava ejections again.Access to the summit is still restricted and visitors may only climb up to 400m elevation accompanied by an authorized mountain guide, but it is being discussed wether new rules to allow access to the summit will be established. This will be communicated here as soon as it happens. [less]

On July 21, the activity inside Pu'u 'O'o cone ceased, and a new intrusion made its way to the surface in the area east of the cone and uprift from Kupaianaha shield (active in the 1990s). More news and photographs about this remarkable change in the ongoing eruption can be found at HVO's update pages: http://volcano.wr.usgs.gov/hvostatus.php.

As more news has become available, the news about an effusive flank eruption at Lengai around 15 July turns out to be probably false. The observed "ashcloud" was dust from a landslide. This demonstrates how difficult it is in this area to have robust information. The ongoing seismic activity in the Gregory Rift, however, is quite peculiar.

Over the past week, the lava lake inside the Puu Oo crater became less and less alimented, dropped several meters inside an 8-shaped system of levees. It remaining active in this smaller area, fed by the eastern vent, but by yesterday, its activity appears to have ended according to information from HVO. Instead, new vents have become active in the western area of the Puu Oo cone.

After last week's intense ash eruptions generating plumes 2-3 km high, Gamkonora volcano has quieted down over the past days. Since July 13, seismicity has decreased sharply and no new larger ash eruptions have occurred since then.The Indonesian Volcanological Survey has lowered the alert level and many villagers who had been evacuated from the slopes of the volcano have returned home.

The strong explosive activity at Klyuchevskoy continues. Since June 28, the strongest explosions have been generating ash columns to 10 km high and the resulting ash plume is now forming a band of ash streching as far as Alaska. The ash plume is of major concern for aircraft in the area and air traffic in the area needs to be diverted.

Mild strombolian activity and the effusion of two small lava flows continue at Pacaya volcano. New small lava flows ca. 150 and 300 m long are present on the upper NE flank, travelling NE and N towards Los Llanos y Cerro Chino.

Strombolian activity at Guatemala's Fire Mountain "Fuego" remains high. INSIVUMEH reports exposions of typically 50-100 m height, although sometimes stronger explosions, such as one on on 1 July throw lava to up to 300 m.A new lava flow, about 250 m long, and headed towards the Río Taniluyá river had started on 27 June from the secondary vent. The older flow, mostly active in March-April, originating from the summit crater, continues slowly as well.

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On July 2nd, HVO reported new lava deep on the bottom of Pu‘u ‘Ō‘ō crater, which has subsided by about 100 m in places during the recent drainage eposide associated with a brief eruption higher up the Rift Zone. The first sightings being made by local helicopter companies on their routine sightseing flights over the crater, fresh lava flows probably erupted this morning and covered older flows on the bottom of the crater.In the afternoon, lava was flowing across the crater floor and the lava source was below the location of the Beehive vent. The lava flowed eastward and ponded near the crater center. Loud, gas-jetting noises could be heard associated with spattering on the crater floor.The crater is still filled with fume making the new lava difficult to see.No lava was seen anywhere on the flow field or at the sea entry where it was last seen on June 20. After a similar event in late January, 1997, lava returned to Pu‘u ‘Ō‘ō 23 days later and again flowed towards the ocean a few weeks after that.

Strong explosive and effusive activity at Klyuchevskoy volcano continues. The activity peaked on 29-30 June when near continuous ash emissios produced ash plumes more than 10 km (or 32,000 ft) high that extended up to 300 km to the west and south-west. KVERT maintains the highest level of alert for Klyuchevskoy.

There is no lava on the surface of Kilauea volcano. Since the last, brief eruptive episode due to an intrusion in the upper eastern rift zone on 18/19 June, Pu'u O'o, the vent of the recent long-lasting eruption, is slowly deflating while HVO records continuing inflation at the summit caldera.Wether this is the end of the longest known historic eruption on Hawaii - starting in 1983 and virtually ongoing uninteruptedly until 19 June 2006, is still unclear or a matter of definition. The near to medium future (weeks to months, probably) will also tell whether the present inflation of the summit caldera heralds some new summit activity, similar as in the early 1980s.

Santiaguito lava dome is showing an above average level of activity. Explosions from the lava dome produce ash plumes rising to altitudes of 4.3-4.7 km (14,000-15,400 ft) a.s.l., that drift mainly to the SW. On 5 June, a lahar (mud flow) descended the Nima I river and carried blocks 1-1.5 m in diameter and tree branches. The approximately 12-m-wide and 3-m-thick deposit was hot and smelled of sulfur. Continuous landslides of blocks and ash were noted on the SW flank.

Kliuchevskoi continues to be active above background levels. Video and visual observations during 1-4 June show strombolian and vulcanian eruptions at the summit crater, as well as lava flows generating steam explosions where hot lava interacts with ice on the NW and SE flanks. Ash plumes rose to altitudes of 7 km (23,000 ft) a.s.l. and drifted E and SE during 1-6 June. Plumes were seen on satellite imagery drifting E and S during 1-8 June. Based on information from KVERT, the Tokyo VAAC reported that an ash plume rose to an altitude of 6.1 km (20,000 ft) a.s.l. and drifted NW on 12 June.

During the past week, activity at Karymsky volcano had been decreasing, although sprodic strombolian ash explosions are still occurring. After a temporary decrease from Orange to Yellow, KVERT raised the alert level back to Orange, following an explosion on 9 June.

An explosion from Bulusan on 12 May produced an ash plume that rose to an altitude of 5.6 km (18,400 ft) a.s.l. and drifted WSW and WNW. The activity was accompanied by rumbling sounds and was recorded by the seismic network as an explosion-type earthquake that lasted about 35 minutes.

The explosive-effusive eruption of Klyuchevsy volcano continues and the alert level has been raised to red. Ash explosions more than 10 km (32,800 ft.) ASL could occur at any time. The activity of the volcano could affect international and local aircraft.The amplitude of volcanic tremor has increased during last few days. According to visual data from Kozyrevsk and Klyuchy, an ash plume from the central crater about 9700 m (31900 ft) ASL was observed at 03:50 UTC on May 16 extending to the North. According to satellite data, ash plumes extended for 200-600 km (125-370 mi) to the north-east, north-west, and east from the volcano this week. A large thermal anomaly was noted all days.

A new short-lived but intense summit eruption (paroxysm) took place at Etna volcano on the afternoon of 29 April. Following a large increase in seismic activity from 11h00 loacl time, the eruption started at around 16:00 with lava fountaining and ash emission from the SE crater. Lava flows that travelled into the Valle del Bove were emitte from vents at the base of the SE crater. The eruption ended abruptly shortly after midnight early on 1 May.

Live webcams of Bardarbunga volcano: Watch live webcam image, seismic and other real-time data in real time. If the large Icelandic volcanic erupts, you could follow the activity here.

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